|
背投屏幕的原理与传统电视类似，它的投影源位于屏幕后一个封闭的环境中，使整个背投屏幕系统可以较少地受到环境光条件的影响。
|
|
|
|
|
|
|
视图尔特提供品种齐全的背投软幕和硬幕，下面介绍的是我们最流行的背投漫反射屏幕。玻璃基底的硬幕尺寸可达10X25英尺，亚克力硬幕可达9X16英尺。这些屏幕都是坚硬的，可清洗的，具备良好的增益性和出色的比色度
环境光是损害图像质量的首要因素。 将投影机安装在一个封闭的房间内，几乎可以消除全部干扰投影图像的环境光线。背投系统还可使设备隐蔽和安全。
因为这种设计需要在屏幕后预留足够的空间，所以大部分的墙内安装系统都是在新房间建造和装修时完成的。你的安装工程师可能推荐您使用视图尔特的 光学镜反射系统， 能够缩短大约一半的光路和投影长度。
|
|
|
背投软幕
Aeroview 100
This material features excellent white field uniformity and is
ideal for data, video, film and slide projection where ambient
light is controllable. It provides an extremely wide viewing angle
for wide seating plans. Aeroview is the best choice when employing
short term focal length lenses. Click here for
more technical information.
 Gain:
1.0
Viewing Angle: 180 Degrees
Filmscreen 100
Filmscreen 100 is a new flexible rear diffusion projection material.
It is composed of a dark tint for additional contrast. Filmscreen
100 is excellent in rooms with wide viewing angles and where moderate
ambient light is a concern. It is available 40 feet by 90 feet
seamless and in all fixed and retractable frame models. Click here for
more technical information.
Gain:
1.0
Viewing Angle: 180 Degrees
Lumiflex 130
This material is used most in rear projection business applications.
Ideal for data, video, film and slide projection where ambient
light is controllable. It provides an extremely wide viewing angle
for wide seating plans. Click here for
more technical information.
 Gain:
1.3
Viewing Angle: 160 Degrees
Filmscreen 150
This material has a dark tint for additional contrast and is excellent
in rooms where high ambient light is a concern. Appropriate for
moderate viewing angles. Click here for
more technical information.
 Gain:
1.5
Viewing Angle: 120 Degrees
Diffusion Type Screens
Since Stewart manufactures custom screens in large
plants, identical gain and color temperature are achieved for
multiple screen applications, ensuring more uniform side-by-side
viewing.
Physical
Properties:
• Optical Coating: tough enough to
withstand considerable accidental abrasion during
normal use
• Surface Scratches: do not impair the
efficiency of the screen; however treat with
care, do not touch unnecessarily, nor should
tape, chalk, or grease pencil be used
• Materials: acrylic types are machined to commercial
tolerances and are free from aberrations; glass types for clarity
Selecting
the Substrate:
• Glass and acrylic substrates provide a
high level of sound proofing between the
projector and the audience area.
• Stewart Filmscreen can also manufacture on
other clear substrates on special order
Glass Substrate
Stewart's full line of rigid rear projection screens
are available in glass sizes up to 10' 10" x 25', outside
dimensions. Stewart's unique manufacturing process permits identical
gain and color temperature matching for multiple screen applications,
ensuring more uniform side-by-side viewing.
Advantages
of glass:
• Ease of cleaning - no special
techniques
• Extra rigidity for extreme flatness
• Permits use of grease pencil or other marking device
Aeroglas 100
Excellent white field uniformity. This is a rigid rear
projection screen ideal for data, video, film and slide projection
where ambient light is controllable. It provides an extremely
wide viewing angle for wide seating plans. Click here for
more technical information.
Gain: 1.0
Viewing Angle: 180 Degrees
Techscreen 100
Techscreen 100 is a new rigid rear diffusion projection material.
It is composed of a dark tint for additional contrast. Techscreen
100 is excellent in rooms with wide viewing angles and where moderate
ambient light is a concern. Click here for
more technical information.
Gain:
1.0
Viewing Angle: 180 Degrees
Graphite
70 & 100
Stewart Filmscreen introduces the first acrylic rear projection
screen line embedded with new contrast enhancing technology. Graphite
100 and Graphite SL 70 have excellent wide angle viewing cones,
deep black levels and high ambient light resistance. These innovative
screen materials utilize a specially formulated diffusion surface
layer fused on an elite acrylic substrate (material OD sizes up
to 6' x 10'). Graphite 100, a 1.0 gain screen, is engineered specifically
for long throw lens projectors. For short throw lens projectors,
Graphite SL 70 perfectly displays a bright uniform image with
rich black levels. Click here for
more technical information.
Lumiglas 130
Ideal for data, video, film and slide projection where
ambient light is controllable. It provides a wide viewing angle
for wide seating plans. Click here for
more technical information.
Gain: 1.3
Viewing Angle: 160
Degrees
Techscreen 150
This material has a dark tint for additional contrast and is excellent
in rooms where high ambient light is a concern. Appropriate for
moderate viewing angles. Click here for
more technical information.
Gain: 1.5
Viewing Angle: 120
Degrees
Acrylic Substrate
Stewart's full line of rigid rear projection screens
are available in acrylic sizes up to 9' x 25', outside dimensions.
Stewart's unique manufacturing process permits identical gain
and color temperature matching for multiple screen applications,
ensuring more uniform side-by-side viewing.
Advantages
of acrylic:
• Resistance to vibration or impact
breakage
• Lighter in weight compared to glass
• Ease of machining as in the case of systems component with
special mounting, engraved reference points or design as part
of the image.
Aeroplex 100
This material features excellent white field uniformity and is
ideal for data, video, film and slide projection where ambient
light is controllable. It provides an extremely wide viewing angle
for wide seating plans. Click here for
more technical information.
Gain:
1.0
Viewing Angle: 180 Degrees
Techplex 100
Techplex 100 is a new rigid rear diffusion projection material.
It is composed of a dark tint for additional contrast. Techplex
100 is excellent in rooms with wide viewing angles and where moderate
ambient light is a concern. Click here for
more technical information.
Gain:
1.0
Viewing Angle: 180 Degrees
Lumiplex 130
This material is used most in rear projection business applications.
Ideal for data, video, film and slide projection where ambient
light is controllable. It provides a wide viewing angle for wide
seating plans. Click here for
more technical information.
Gain: 1.3
Viewing Angle: 160 Degrees
Techplex 150
This material has a dark tint for additional contrast and is excellent
in rooms where high ambient light is a concern. Appropriate for
moderate viewing angles. Click here for
more technical information.
Gain: 1.5
Viewing Angle: 120 Degrees
漫反射型屏幕
Fresnel Screen Type:
• Wide horizontal viewing half angle greater than 35﹟
• Color corrects image transmitted
• Provides even light distribution without
hot spots
Lenticular Lens:
• Each lens is defined by a hyperbolic function
• Allows all the light entering each of the many
Lenticular lenses exit through the end portion giving way to wide
horizontal-viewing angle
How
Fresnel and Lenticular Lens Work Together:
The OptaScreen/OptaWave Screen
consists of a Fresnel lens that condenses the
incident light from the projector. In this case
the fresnel lens is making sure the light from
the projector is turned into a parallel system of
light arrays that can be managed through the
Lenticular lens system. The Lenticular lenses
define the light distribution in the horizontal
and vertical direction. By controlling the
horizontal and vertical distribution of the
light, an optimum performance is achieved because
all light is directed towards the area of the
desired viewing positions.
BlackHawk Xtreme
BlackHawk Xtreme is the ultimate screen to perform under the highest
levels of ambient light. This rigid rear acrylic material optimizes
the fullest potential of your single lens projector by maintaining
high contrast levels and high ambient light. Rich black levels
and bright whites are achieved with no hotspotting and razor sharp
images at all angles. Available with (recommended for short throw
projection) or without (recommended for long throw projection)
Fresnel. Click
here for more technical information.
OptaWave
The OptaWave large
screen display matrix distributes light in an exceptionally wide
viewing cone (180 Degrees). A multi-purpose screen, the OptaWave
is completely color corrected and excellent for data/graphics
displays as well as motion picture projection. With OptaWave,
multi-screen, multi-image visual display systems are made more
functional, economical and accessible. Click
here for more technical information.
Features:
• High gain, high contrast - even in ambient
light
• No secondary "ghost" images
• Extremely high resolution (excellent in
data/graphics displays)
• Completely color corrected
• Flawless viewing surface, no distracting
artifacts
• Available with dry marker write-on surface
• Washable
Gain: peaks
at 4.0
Viewing Angle: 180 Degrees
| How
OptaWave Works
|
|
Fresnel Lens: located on the
projector side absorbs focused projector
light
Diffusion Particles: controls
light distribution and color balance
Lenticular Lens: located on the
audience side provides wide, horizontal distribution of projected
light |
Characteristics
Aspect Ratio: All
Horizontal Half Gain: (+ or -) 55
Degrees
Vertical Half Gain: (+ or -) 8 to 10 Degrees
Fresnel Groove Pitch: .02"
Lenticular Pitch: .03"
Screen Thickness: 1/4" (67-125" Diagonal)
Flatter lenticular pitch provides wider viewing angle.
MicroWave
Offering detailed images and a wide viewing cone (180
Degrees), MicroWave maintains high efficiency and contrast. Designed
and engineered for extremely high resolution, MicroWave is ideal
for projection of such complex images as maps, circuitry drawings
and technical and training environments. Click
here for more technical information.
Features:
• Lenticular pitch of 0.4mm - half that of
any other on the market
• Precise reproduction of detail
• High light efficiency
• Fresnel Groove Pitch available in both
.02" and .01"
Gain: peaks
at 3.0
Viewing Angle: 180 Degrees
| How
MicroWave Works
|
|
Fresnel Lens: located on the
projector side absorbs focused projector
light
Diffusion Particles: controls
light distribution and color balance
Lenticular Lens: located on the
audience side provides wide, horizontal distribution of projected
light |
Characteristics
宽高比： All
Horizontal Half Gain: (+ or -) 53
Degrees
Vertical Half Gain: (+ or -) 10 to 12
Degrees
Fresnel Groove Pitch: .02" or
.01"
Lenticular Pitch: .0015"
Screen Thickness: 1/4" (67-84" Diagonal)
PowerView
This rigid rear projection screen features high light transmission
and imparts a high contrast image to the viewer. Powerview rear
screens are designed to increase projected image brightness 3
to 4 times over conventional diffusion screens. Click
here for more technical information.
Features:
?High light transmission
?High gain, high contrast
?No secondary "ghost" images
?Extremely high resolution
?Flawless viewing surface, no distracting artifacts
?Available with dry marker write-on surface
Gain:
peaks at 5.0
Viewing Angle: 120 Degrees
| How PowerView
Works
|
|
Fresnel
Lens:
located on the projector side absorbs focused projector
light
Diffusion Particles:
controls light distribution and color balance
Lenticular Lens:
located on the audience side provides wide, horizontal distribution
of projected light |
Characteristics
宽高比: All
Horizontal Half Gain: (+ or -) 28 Degrees
Vertical Half Gain: (+ or -) 8 to 10 Degrees
Fresnel Groove Pitch: .02"
Lenticular Pitch: .03
Screen Thickness: 1/4" (67-125" Diagonal),
3/8" (150-180" Diagonal)
|
